An acoustic wave is generated in a silicon wafer during a non-destructive semiconductor quality test. The wave has a frequency of 24 MHz24\text{ MHz}24 MHz (24×106 Hz24 \times 10^6\text{ Hz}24×106 Hz). The speed of this acoustic wave in silicon is 8400 m/s8400\text{ m/s}8400 m/s.
Calculate the wavelength of this acoustic wave in the silicon wafer.
Use the equation:
wavelength=wave speedfrequency \text{wavelength} = \frac{\text{wave speed}}{\text{frequency}} wavelength=frequencywave speed14 exam-style questions on AQA GCSE Physics 6.1 Waves in air, fluids and solids, covering 6.1.1 Transverse and longitudinal waves, 6.1.2 Properties of waves, 6.1.3 Reflection of waves, 6.1.4 Sound waves (HT only), and 6.1.5 Waves for detection and exploration (HT only). Each one has a worked solution and a mark scheme showing where the marks go.